Hi all ... after reading Franks article about magnetic clamps on Frets.com, I'm ready to construct a few just to (a). have some fun playing with magnets and epoxy, and (b). because they actually look pretty darned useful to have around for clamping-up cauls in weird places.
My question for Frank: you mentioned that 2 magnets over a steel bar would "complete the magnetic circuit" and make for a stronger pair. When placing the two magnets on the steel bar (prior to drowning 'em in goo) does attention have to paid to the polarity of the magnets with respect to each other? In other words, each one will grab the bar fine, but are they placed on the bar so that the "attracted" face of each one go flat to the bar... or does it matter? I'm thinking there might be an issue when constructing the mating clamp, being careful that nothing ends-up repelling instead of attracting. ....Or am I just overthinking the issue?! Thanks.